How to load form validation rules from a database

First thing to do is add a database table like so:

CREATE TABLE form_validation (
pk_form_validation_id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
form_key VARCHAR(20) DEFAULT NULL,
field VARCHAR(50) DEFAULT NULL,
title VARCHAR(50) DEFAULT NULL,
rules TEXT,
PRIMARY KEY (pk_form_validation_id)
);

Then if you haven't created